Slaves don't get Medal of Honor for service.
If they are lucky, it just may save them some extra whipping -- if we are to go by the rather sad, tragic and most reprehensible standards of 300 years of slavery in the Western Hemisphere: America, North and South and Central and the Caribbean.
What no one should forget is that we are all fully owned slaves of Allah. As a result, what we do -- and what we must -- in the service of God, and God's Creation, is nothing but a tiniest fraction of what is really expected and required -- and needed -- of us.
Just tell them to keep on working!
Allah and his messenger and the believers will all
watch and observe and keep track of what you do.